NEW YORK — Avicii, the Grammy-nominated electronic dance DJ who performed sold-out concerts for feverish fans around the world and also had massive success on U.S. pop radio, died Friday. He was 28. Publicist Diana Baron said in a statement that the Swedish performer, born Tim Bergling, was found dead in Muscat, Oman. “It is with profound sorrow that we announce the loss of Tim Bergling, also known as Avicii,” the statement read.